Melon Bomb Invades

"Melon Bombs make an appearance in multiplayer.

Bonuses await the player who delivers the final blow. Defeat them before they explode into tasty bits!"

- In-game description

Melon Bomb Invades was a special multiplayer event, featuring battles against the Melon Bomb. The event is part of the Summer Resort event series, offered in July 2018.

Event Details

 * Event duration: July 1 - August 5, 2018
 * Event type: Multiplayer battle (guest Sicarius)

How to Participate

 * Select Ring of Braves from the world map. Find a Party against the Melon Bomb at ★3 to ★5 difficulties, or form a Party of your own, with your choice of other players.

Available Prizes
Defeating the Melon Bomb gained special event-only Components: These changed on a weekly basis, as the Melon Bomb's elemental affinity changed, along with the constant. Players with these components could trade them at the Item Exchange in the Ring of Braves for special prizes, offered for the week of that element, plus the week after. Once the two-week span expired, the Melon Slices would change into other components (usually Melon Fragments), and the items for that element's Slices would be removed from the Exchange.

Generally offered, subject to each week's element:

So for example, week 1 saw the show up for  x60, which was removed after week 2. Week 2 saw the show up for  x60, which was removed after Week 4... and so on.

The run also saw these unique cards, offered only while their particular element was tradeable:

Defeat the Melon Bomb Campaign
This was a special campaign posted to promote fighting the Melon Bomb in the Ring of Braves. If enough players defeated the Melon Bomb all players would gain rewards after July 19. A tally board tracking the number victories against the Bomb was placed next to Meia in the Ring of Braves.
 * July 1 - 15, 2018

Reference

 * Melon Bomb Invades news page
 * mao-shiro's comprehensive listing on Reddit